Specification - with vacuum bag: yes - sealing length: 30cm - power source: electric - material: 52 * 90mm - size: 37 x 8 x 7cm *high quality product: subjected laboratory testing to effectively increase food shelf life. External exhaust and water inlet are added, keep reliability of the food sealer machine. *easy to operate& convenience in the kitchen: full-automatic simple electric plug in design with the control center placed on the top panel. Fast vacuum sealing with low vibration, low noise, safety lock design keeps the food sealing machine tightly closed when operating. *two.